One effect of the interstate Commerce Act (1877) was to put regulations on which industry

Railroad, is the right answer.

Explanation:

The Congress of the United States enacted a law, known as the Interstate Commerce Act of 1887. This law intended to regulate the railroad industry, in particular, the monopolistic practices performed by the railroad industry. The main feature of the act was that it required the government to keep the rates of railways "reasonable and just," however, it did not authorize the government to set a specific rate.

Hello! The answer to your question would be as followed:

One effect of the interstate Commerce Act (1877) was to put regulations on which industry

The railroad industry